True Demon Form

Activation:
When the User gets enraged by a Person due to an Argument or an Action, the Player can decide to activate his True Demon Form.

Form:
The True Demon Form is a Manifestation of the most inner true Self of the Caster.
You Character will dependend on you Character double in Size. (Means that a 6ft Human will be 12ft, A 3ft Halfling will be 6ft and a 7ft Goliath will be 14ft tall)
Visually your more of a Scheme. Your Figure will become a living Shadow that came from the Depth of Hell

Abilities:
When you are a Caster, you loose the ability to cast Spells, that is due to your agitated Mood (your fuming in Anger).
Due to the increased Size and your Body consisting of Shadow your Attack Reach extends to upto 35ft.
Your Meele attacks will deal Slashing damage. A melee attack will deal 1d8 Slashing Damage and an additional 2d6 necrotic damage.
On a successful saving throw the Target takes half of the Slashing Damage but additionally takes 1d6 necrotic damage.

End of the Spell:
If a trusted Companion is in hearing Range then can roll a D20 against the Person in its True Demon Form. If the trusted Companion rolls Higher, the True Demon Form will End.

At 6th level,12th level and 18th level add 1d8 of slashing damage and 1d6 of Necrotic Damage to the meele attack. 
At 12th level instead of 2 Meele attacks, you get the opportunity for 4 Meele attacks.